Again, for those who don't know:
The Hugo Awards (named for science fiction pioneer Hugo Gernsback) are a long-running series of Science Fiction Achievement Awards selected by popular vote of the fans registered for the WorldCon.
Registered members of Interaction and L.A.con IV are eligible to nominate works that were released/performed/published during 2005 for this year's Hugo awards.
On a general note, Emerald City (with much input from basfa) produces an annual Hugo Recommendations list. Fans get together and brainstorm about short stories, novels, television shows, movies and other publications that are eligible for award this year. NESFA does too, but they're out in the Northeast and their brains are frozen, so anything you read there you should take with a grain of salt.
If you've received your Hugo nomination ballot, and haven't any idea what to put on it, check out these lists. You might be reminded of something you read, something you saw or something you listened to that you might want to nominate. Don't just take the list's recommendation.
Being that I'm filled with the Gospel of Doctor Who, I'm going to pimp three specific nomination suggestions for you to consider:
Best Dramatic Presentation, Short Form: Doctor Who "Dalek"
Murmurs are floating around Doctor Who fandom that if you're going to nominate any episode of Doctor Who for a Hugo, make sure you nominate "Dalek."
Best Dramatic Presentation, Long Form: Doctor Who "The Empty Child/The Doctor Dances"
There are people who argue that a two-part TV show (even one that's 90 minutes and where the episodes can't stand individually) doesn't belong in "Long Form." They're good arguments, but I'd like to see Doctor Who nominated in each category it's eligible for. I've talked about ways to show SciFi that Doctor Who is a hot property that deserves better treatment, and this is one of them.
Best Related Book: Back to the Vortex, J Shaun Lyon
It's a Doctor Who related book. Well, and the author is a friend of mine, and I'd love to see him get a Hugo Losers' tchotchke.
I will also point out, on a non-Doctor Who tangent, that Ready, Steady, Sew (the half-time show for the Interaction Masquerade) qualifies for a "Best Dramatic Presentation, Short Form" nomination. I know it's something a lot of eligible nominators have seen. And, yes, for the record, I was involved in the production.